A transceiver circuit includes a signal generator (11; 21; 31) arranged to generate an output signal; a transmitter (12; 22;32) coupled to the signal generator so as to transmit the output signal; a receiver (14; 24;34) arranged to receive a received signal; a mixer coupled to the receiver and to the signal generator so as to mix the output signal and the received signal so as to produce a mixed signal; and at least one filter (16, 17; 26, 27; 36, 37) coupled to the mixer so as to act upon the mixed signal to produce a filtered signal. The filtered signal includes an unwanted portion of the output signal is received at the receiver without having been reflected from a target. The transceiver circuit further includes a correction circuit arranged to generate a simulated waveform that simulates the behavior of the each filter to the unwanted portion of the output signal and applies a correction so as to remove the simulated waveform from the filtered signal.